Safety back-up for metering pump control
US4839571A · kind A · utility
49Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1987 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Mar 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F25/13
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system to detect partial or complete failure of an accurate meter measuring the flow of a liquid by using a sensor to measure the displacement of the pump as a back-up measurement. A computer is used to compare the feedback from the pump sensor with the meter reading, and if the difference between the two flow measurements is greater than a predetermined amount, an alarm will ring, the meter measurement will be ignored, the system shut down, or some other corrective action instituted by the computer. Redundancy is added to the system without the expense of obtaining an additional precision meter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.